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The Discovery Outburst of the X-Ray Transient IGR J17497-2821 Observed with RXTE and ATCAWe report the results of a series of RXTE and ATCA observations of the recently discovered X-ray transient IGR J17497-2821. Our 3-200 keV PCA+HEXTE spectral analysis shows very little variations over a period of approx.10 days around the maximum of the outburst. IGR J17497-2821 is found in a typical low-hard state (LHS) of X-ray binaries (XRBs), well represented by an absorbed Comptonized spectrum with an iron edge at about 7 keV. The high value of the absorption (approx.4 x 10(exp 22/sq cm suggests that the source is located at a large distance, either close to the Galactic center or beyond. The timing analysis shows no particular features, while the shape of the power density spectra is also typical of the LHS of XRBs, with apprrox.36% rms variability. No radio counterpart is found down to a limit of 0.21 mJy at 4.80 and 8.64 GHz. Although the position of IGR J17497-2821 in the radio to X-ray flux diagram is well below the correlation usually observed in the LHS of black holes, the comparison of its X-ray properties with those of other sources leads us to suggest that it is a black hole candidate.
Document ID
20080046917
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Rodriquez, Jerome
(Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Bel, Marion Cadolle
(Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Tomsick, John A.
(California Univ. Berkeley, CA, United States)
Corbel, Stephane
(Commissariat a l'Energie Atomique Gif-sur-Yvette, France)
Brocksopp, Catherine
(University Coll. London, United Kingdom)
Paizis, Ada
(IASF Milan, Italy)
Shaw, Simon E.
(Southampton Univ. United Kingdom)
Bodaghee, Arash
(INTEGRAL Science Data Center Versoix, Switzerland)
Date Acquired
August 24, 2013
Publication Date
February 1, 2007
Publication Information
Publication: The Astrophysical Journal
Volume: 655
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NNX07AR86G
Distribution Limits
Public
Copyright
Other

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